US4409154A - Method and apparatus for manufacturing a watertight optical fiber cable - Google Patents
Method and apparatus for manufacturing a watertight optical fiber cable Download PDFInfo
- Publication number
- US4409154A US4409154A US06/231,527 US23152781A US4409154A US 4409154 A US4409154 A US 4409154A US 23152781 A US23152781 A US 23152781A US 4409154 A US4409154 A US 4409154A
- Authority
- US
- United States
- Prior art keywords
- optical fibers
- viscous substance
- tubes
- cylindrical chamber
- inner cylindrical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4483—Injection or filling devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/06—Rod-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/156—Coating two or more articles simultaneously
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4486—Protective covering
Definitions
- the present invention relates to a method and apparatus for manufacturing an optical fiber cable of the type that comprises at least one cellular cylindrical structure of plastic material defining a plurality of longitudinal bores in which individual optical fibers are housed.
- the bores are of larger diameter than the fibers and the bore volume which is not occupied by the fibers is filled with a viscous substance.
- Preferred implementations of the present invention remedy this drawback and provide a high quality fiber cable by means of a simple and speedy method using apparatus which is both simple and inexpensive.
- the present invention provides a method of manufacturing an optical fiber cable of the type which comprises at least one tubular cylindrical structure of plastic material having a plurality of longitudinal bores housing individual optical fibers and filled with a viscous substance, wherein the optical fibers pass through respective tubes which each have a gap of some length; a viscous substance is injected under pressure into said tubes so that said viscous substance fills the tubes around the optical fibers; the optical fibers coated with said viscous substance are made to protrude beyond the ends of said tubes; a thermoplastic material is simultaneously extruded around the coated optical fibers through an annular orifice and under sufficient pressure to completely cover said optical fibers with their respective coatings of viscous substance; and the cylindrical structure thus obtained is then rapidly cooled.
- the viscous substance is injected and the thermoplastic substance is extruded under relative pressures such that radial expansion of the thermoplastic substance before it is cooled is avoided; and wherein the extruded product constitutes a uniform body occupying the space in between the optical fibers with their coatings of viscous substance.
- the movement of the cooled cylindrical structure is synchronized with the speed at which the bare optical fibers are inserted.
- the apparatus in accordance with the invention comprises an inner cylindrical chamber with an upstream end plate and a conical downstream end which forms a nozzle.
- Optical fiber guide tubes which are parallel to the axis of the inner cylindrical chamber and which pass through an upstream end plate and through said conical downstream end and include an opening such that they can be filled with a viscous substance from the inner cylindrical chamber.
- a pipe supplies the viscous substance, said pipe communicating with said inner chamber.
- An outer cylindrical chamber supplies a melted thermoplastic substance, the downstream end of said outer chamber ending in a conical die which surrounds said nozzle of the inner cylindrical chamber.
- a pipe supplies a thermoplastic substance, said pipe communicating with said outer chamber.
- It also preferably includes means for synchronizing the speed at which the cooled cylindrical structure is extruded with the speed at which the bare optical fibers are inserted in the inner chamber.
- FIG. 1 is a transverse cross-section of a cable with a central carrier core and five cellular structures.
- FIG. 2 is a transverse cross-section of a cable with seven cellular structures.
- FIG. 3 is a transverse cross-section of a cable with an internal reinforcing member which prevents deformation due to water pressure.
- FIG. 4 is a perspective view in partial diametrical cross-section through an apparatus for manufacturing a cylindrical structure having longitudinal bores that house individual optical fibers and a filling viscous substance.
- FIG. 5 is a diametrical cross-section through apparatus analogous to that in FIG. 4 and showing means for supplying the viscous substance and for supplying the thermoplastic material which constitutes the cylindrical structure.
- FIG. 1 shows a cable for use in oil drilling which, going from the center to the periphery of the cable, comprises:
- a central strength member 1 made of strands of steel wire or of high tensile fibers of polyester or of aromatic polyamide, e.g. the polyamide "Kevlar” marketed by du Pont de Nemours.
- each tubular structure Surrounding the strength member 1, there are five tubular structures such as those referenced 2, 3 & 4. These tubular structures have longitudinal bores 9 housing individual optical fibers 8 and filled with a viscous substance such as polybutene.
- the body of each tubular structure is made of a thermoplastic material 10, e.g. polyethylene, or a polyamide such as that marketed under the trade mark "Nylon” by du Pont de Nemours.
- the tubular structures are cylindrical in shape and they are helically wound round the central strength member.
- a damper mattress 5 is made up of strips of glass-fiber fabric helically wound around the preceding layers.
- Two layers 6 and 7 of high-tensile steel wires wound in opposite directions, constitute double armouring.
- the central strength member 1 is replaced by tubular structure 11 analogous to the tubular structures 2,3, 4 of FIG. 1.
- This axial structure is surrounded by six other identical structures 2,3, 4 . . . of same diameter tangential to one another and helically wound around the axial cellular structure 11. Therefore as much of the available space as possible is occupied by fiber-carrying structures.
- the damper mattress 5 and the armour layers 6 and 7 are identical to those in FIG. 1.
- FIG. 3 illustrates a variant for use as an undersea optical fiber cable.
- a single tubular cylindrical structure constituted by a thermoplastic body 10 with seven longitudinal bores 9 housing individual optical fibers 8 filled with a viscous substance is covered with a mattress layer 5 formed by helically wound fiber glass tapes and then an armour layer 15 in the form of a vault constituted by steel wires 16 whose cross-section has generally V-shaped portions which interlock in one another so as to form a structure which cannot be deformed by water pressure.
- the whole is covered with an outer polyethylene sheath 17.
- apparatus for forming a tubular structure is fed with bare or covered optical fibers 21 which come from one or several storage reels (not shown) placed upstream.
- Filling and extrusion apparatus 22 includes a nest of tubes 23 placed on or parallel to its axis, which tubes are surrounded by a cylindrical outer casing 25 which is closed at both ends. At the upstream end, the tubes pass through the plane partition or end wall 26. At the downstream end, the tubes pass through a conical nozzle 27 and project slightly beyond the end thereof.
- a central tube 23A is continuous and is provided for an inner metal component 23B designed to impart mechanical strength to the cable. It ends flush with the conical nozzle 27.
- the remaining tubes 23 are either discontinuous, as drawn, or are provided with a large opening where they pass through the filling chamber 25a defined by the casing 25.
- a filling substance e.g. polybutene
- a feed tube 28 which passes through the side wall of the casing 25.
- the downstream end of the nozzle 27 constitutes the point of the nozzle built into thermoplastic extrusion apparatus.
- An outer casing 29 is closed on its upstream end by the inner casing 25 and ends on its downstream end in a conical die 30 coaxial with the nozzle 27. It is connected by a side tube 31 to an extruding machine (not shown) for feeding with molten thermoplastic substance (polyethylene, polyamide, etc. . . ) which constitutes the body in which the longitudinal fiber-containing bores are formed.
- molten thermoplastic substance polyethylene, polyamide, etc. . .
- FIG. 5 illustrates schematically the apparatus as a whole.
- a reel 20 feeds optical fibers to the apparatus (for clearness' sake, only one fiber 21 is shown).
- the inlet nozzle 31 of a tube 22 guides the fiber as it enters the filling and extrusion apparatus.
- the bore-filling substance surrounds the optical fiber via the gap between the tube portions 23 and is urged forward by a heating gun 32 which feeds the pipe 28 that enters via the rear of the casing 25.
- thermoplastic substance is discharged by the screw-type extruding machine 33 with an endless screw 35 that pushes said substance via pipe 31 into the space 29a between the punch 27 and the die 30 to constitute the plastic body of the cylindrical structure 34 in which cell a fiber-containing bore 36 is formed. Said bore is completely filled by virtue of the viscous substance applied around the fiber during its passage through the inner casing 25.
- the viscous substance must be injected at a pressure such that the hot thermoplastic substance does not expand radially when it leaves the punch-die assembly.
- thermoplastic substance must be cooled immediately and rapidly at the outlet of the punch-die assembly to reduce longitudinal and radial shrinkage of the thermo-plastic substance to acceptable values, e.g. by means of a known water discharge apparatus (not shown).
- the speed at which the bare or protected optical fiber is fed off the supply reel must be equal to that at which the completely cooled extruded structure moves. This can be achieved by means of apparatus (not shown) which is known per se and which is used for synchronizing the linear speed of the cold extruded product with the fibre unwinding speed.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Insulated Conductors (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8002563A FR2475238A1 (fr) | 1980-02-06 | 1980-02-06 | Cable a fibres optiques, etanche a l'eau, et procede et dispositif de fabrication de ce cable |
FR8002563 | 1980-02-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4409154A true US4409154A (en) | 1983-10-11 |
Family
ID=9238274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/231,527 Expired - Fee Related US4409154A (en) | 1980-02-06 | 1981-02-04 | Method and apparatus for manufacturing a watertight optical fiber cable |
Country Status (5)
Country | Link |
---|---|
US (1) | US4409154A (fr) |
EP (1) | EP0034286B1 (fr) |
JP (1) | JPS56155904A (fr) |
DE (1) | DE3166755D1 (fr) |
FR (1) | FR2475238A1 (fr) |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4474638A (en) * | 1982-02-26 | 1984-10-02 | Siemens Aktiengesellschaft | Device for manufacturing electrical and optical cables |
EP0255686A2 (fr) * | 1986-07-31 | 1988-02-10 | Siemens Aktiengesellschaft | Méthode pour la fabrication d'un élément optique de transmission rempli et dispositif pour la réalisation de la méthode |
US4732716A (en) * | 1985-06-28 | 1988-03-22 | Mitsubishi Rayon Company Ltd. | Process for preparation of multifilament optical fibers |
US4744935A (en) * | 1985-09-27 | 1988-05-17 | Societa Cavi Pirelli S.P.A. | Process and apparatus for manufacturing a cable with helical filaments embedded in plastic |
US4792422A (en) * | 1984-12-31 | 1988-12-20 | Ericsson, Inc. | Method of making an optical fiber cable |
US4805981A (en) * | 1984-11-15 | 1989-02-21 | British Telecommunications, Plc | Telecommunications cable containing optical fibers |
US4834635A (en) * | 1986-02-06 | 1989-05-30 | Cadbury Limited | Extrusion die for extruded product |
US5004574A (en) * | 1987-12-28 | 1991-04-02 | Hartley Sandt | Method of making a composite structural element |
US5115485A (en) * | 1987-05-04 | 1992-05-19 | Rochester Corporation | Cable for housing parallelly oriented optical fibers and method and apparatus for producing the same |
WO1992016347A1 (fr) * | 1991-03-13 | 1992-10-01 | Hartley Sandt | Element structurel composite et procede de production |
US5372757A (en) * | 1993-09-03 | 1994-12-13 | Tensor Machinery Ltd. | Apparatus and method for sheathing optical fibers |
US5395557A (en) * | 1993-08-31 | 1995-03-07 | Alcatel Na Cable Systems, Inc. | Method and apparatus for applying gel to a plurality of optical fibers |
US5576081A (en) * | 1987-12-28 | 1996-11-19 | Sandt; Hartley | Composite structural element and process for making same |
US5601646A (en) * | 1995-05-26 | 1997-02-11 | Alcatel Na Cable Systems, Inc. | Apparatus for applying gel to a plurality of optical fibers |
US5709752A (en) * | 1991-09-18 | 1998-01-20 | Siemens Aktiengesellschaft | Apparatus for filling interspaces between leads and a sheath of a cable |
US6656407B1 (en) * | 1995-02-23 | 2003-12-02 | Dmx, Inc. | Axially movable cluster conduits for plastic processing in a screw machine |
KR100476614B1 (ko) * | 1996-04-23 | 2005-07-11 | 넥쌍 | 도체둘레에절연성재료의셀형절연체를제조하는방법및장치와이러한절연체를구비하는동축케이블 |
US20060113026A1 (en) * | 2000-10-12 | 2006-06-01 | Bridgestone Corporation | Apparatus for coating belt cord with rubber |
US20070125301A1 (en) * | 2005-12-01 | 2007-06-07 | Xixian Zhou | System and die for forming a continuous filament reinforced structural plastic profile by pultrusion/coextrusion |
US20070126142A1 (en) * | 2005-12-01 | 2007-06-07 | Xixian Zhou | Method of making continuous filament reinforced structural plastic profiles using pultrusion/coextrusion |
US20100196613A1 (en) * | 2009-02-03 | 2010-08-05 | Nextrom Oy | Method and apparatus for coating a fiber bundle |
US20160363734A1 (en) * | 2015-06-10 | 2016-12-15 | Telect, Inc. | Fiber Blocking Kits |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2104752B (en) * | 1981-07-20 | 1986-02-19 | Chevron Res | Optical communication system for drill hole logging |
FR2519149B1 (fr) * | 1981-12-30 | 1985-07-26 | Cables De Lyon Geoffroy Delore | Dispositif de jonction des extremites de deux cables sous-marins a fibres optiques et son procede de fabrication |
US4523804A (en) * | 1982-08-17 | 1985-06-18 | Chevron Research Company | Armored optical fiber cable |
DE3306551A1 (de) * | 1983-02-22 | 1984-08-23 | Siemens AG, 1000 Berlin und 8000 München | Vorrichtung zur herstellung eines lichtwellenleiterelementes |
FR2549969B1 (fr) * | 1983-07-27 | 1985-09-27 | Cables De Lyon Geoffroy Delore | Procede d'injection d'un produit de remplissage visqueux dans les rainures de logement des fibres optiques d'un jonc, et dispositif de mise en oeuvre de ce procede |
JPS60202412A (ja) * | 1984-03-27 | 1985-10-12 | シユラムバ−ガ− オ−バ−シ−ズ ソシエテ アノニム | 光学フアイバ−ケ−ブルの構造 |
IT1176347B (it) * | 1984-06-29 | 1987-08-18 | Pirelli Cavi Spa | Giunto per cavi sottomarini di telecomunicazione a fibre ottiche |
GB2176905B (en) * | 1985-06-27 | 1989-10-11 | Stc Plc | Optical fibre cables |
EP0336806A3 (fr) * | 1988-03-21 | 1991-02-27 | Alcatel N.V. | Extrusion simultanée d'un tube tampon à deux couches |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1143942A (en) * | 1912-08-28 | 1915-06-22 | Fed Screw Corp | Screw-threading machine. |
US3556635A (en) * | 1967-05-23 | 1971-01-19 | Dow Chemical Co | Fiber optic bundle |
US4172106A (en) * | 1976-06-24 | 1979-10-23 | Telephone Cables Limited | Optical fibre cables and their manufacture |
US4218551A (en) * | 1972-09-29 | 1980-08-19 | Chemische Werke Huls Aktiengesellschaft | Process for the production of polybutene-1 formable into transparent films |
US4219639A (en) * | 1978-08-16 | 1980-08-26 | Conoco, Inc. | Transparent and translucent poly(butene-1) |
US4221756A (en) * | 1978-09-15 | 1980-09-09 | Western Electric Company, Incorporated | Methods of enclosing a plurality of conductors in a partitioned jacket |
US4239871A (en) * | 1978-11-28 | 1980-12-16 | Mitsui Petrochemical Industries Ltd. | Process for polymerization of butene |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE681912C (de) * | 1933-07-28 | 1939-10-04 | Siemens & Halske Akt Ges | Fernmeldeseekabel |
GB1257325A (fr) * | 1967-12-18 | 1971-12-15 | ||
GB1479427A (en) * | 1975-02-05 | 1977-07-13 | Bicc Ltd | Opticle cables |
US4143942A (en) * | 1976-10-26 | 1979-03-13 | Belden Corporation | Fiber optic cable and method of making same |
JPS5417855A (en) * | 1977-07-11 | 1979-02-09 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber cable |
DE2801231C2 (de) * | 1978-01-12 | 1983-05-11 | Siemens AG, 1000 Berlin und 8000 München | Mit Isoliermaterial ummanteltes Starkstromkabel |
GB2021282B (en) * | 1978-05-22 | 1982-06-03 | Post Office | Submarine optical fibre cable |
-
1980
- 1980-02-06 FR FR8002563A patent/FR2475238A1/fr active Granted
-
1981
- 1981-01-30 DE DE8181100668T patent/DE3166755D1/de not_active Expired
- 1981-01-30 EP EP81100668A patent/EP0034286B1/fr not_active Expired
- 1981-02-04 US US06/231,527 patent/US4409154A/en not_active Expired - Fee Related
- 1981-02-06 JP JP1674281A patent/JPS56155904A/ja active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1143942A (en) * | 1912-08-28 | 1915-06-22 | Fed Screw Corp | Screw-threading machine. |
US3556635A (en) * | 1967-05-23 | 1971-01-19 | Dow Chemical Co | Fiber optic bundle |
US4218551A (en) * | 1972-09-29 | 1980-08-19 | Chemische Werke Huls Aktiengesellschaft | Process for the production of polybutene-1 formable into transparent films |
US4172106A (en) * | 1976-06-24 | 1979-10-23 | Telephone Cables Limited | Optical fibre cables and their manufacture |
US4219639A (en) * | 1978-08-16 | 1980-08-26 | Conoco, Inc. | Transparent and translucent poly(butene-1) |
US4221756A (en) * | 1978-09-15 | 1980-09-09 | Western Electric Company, Incorporated | Methods of enclosing a plurality of conductors in a partitioned jacket |
US4239871A (en) * | 1978-11-28 | 1980-12-16 | Mitsui Petrochemical Industries Ltd. | Process for polymerization of butene |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4474638A (en) * | 1982-02-26 | 1984-10-02 | Siemens Aktiengesellschaft | Device for manufacturing electrical and optical cables |
US4805981A (en) * | 1984-11-15 | 1989-02-21 | British Telecommunications, Plc | Telecommunications cable containing optical fibers |
US4792422A (en) * | 1984-12-31 | 1988-12-20 | Ericsson, Inc. | Method of making an optical fiber cable |
US4732716A (en) * | 1985-06-28 | 1988-03-22 | Mitsubishi Rayon Company Ltd. | Process for preparation of multifilament optical fibers |
US4744935A (en) * | 1985-09-27 | 1988-05-17 | Societa Cavi Pirelli S.P.A. | Process and apparatus for manufacturing a cable with helical filaments embedded in plastic |
US4834635A (en) * | 1986-02-06 | 1989-05-30 | Cadbury Limited | Extrusion die for extruded product |
EP0255686A2 (fr) * | 1986-07-31 | 1988-02-10 | Siemens Aktiengesellschaft | Méthode pour la fabrication d'un élément optique de transmission rempli et dispositif pour la réalisation de la méthode |
US4810429A (en) * | 1986-07-31 | 1989-03-07 | Siemens Aktiengesellschaft | Method and apparatus for the manufacture of filled optical transmission elements |
EP0255686A3 (en) * | 1986-07-31 | 1989-08-23 | Siemens Aktiengesellschaft | Method for producing a filled optical transmission element, and device for performing said method |
US5115485A (en) * | 1987-05-04 | 1992-05-19 | Rochester Corporation | Cable for housing parallelly oriented optical fibers and method and apparatus for producing the same |
US5576081A (en) * | 1987-12-28 | 1996-11-19 | Sandt; Hartley | Composite structural element and process for making same |
US5004574A (en) * | 1987-12-28 | 1991-04-02 | Hartley Sandt | Method of making a composite structural element |
WO1992016347A1 (fr) * | 1991-03-13 | 1992-10-01 | Hartley Sandt | Element structurel composite et procede de production |
US5709752A (en) * | 1991-09-18 | 1998-01-20 | Siemens Aktiengesellschaft | Apparatus for filling interspaces between leads and a sheath of a cable |
US5395557A (en) * | 1993-08-31 | 1995-03-07 | Alcatel Na Cable Systems, Inc. | Method and apparatus for applying gel to a plurality of optical fibers |
US5372757A (en) * | 1993-09-03 | 1994-12-13 | Tensor Machinery Ltd. | Apparatus and method for sheathing optical fibers |
US6656407B1 (en) * | 1995-02-23 | 2003-12-02 | Dmx, Inc. | Axially movable cluster conduits for plastic processing in a screw machine |
US5601646A (en) * | 1995-05-26 | 1997-02-11 | Alcatel Na Cable Systems, Inc. | Apparatus for applying gel to a plurality of optical fibers |
KR100476614B1 (ko) * | 1996-04-23 | 2005-07-11 | 넥쌍 | 도체둘레에절연성재료의셀형절연체를제조하는방법및장치와이러한절연체를구비하는동축케이블 |
US20060113026A1 (en) * | 2000-10-12 | 2006-06-01 | Bridgestone Corporation | Apparatus for coating belt cord with rubber |
US20070125301A1 (en) * | 2005-12-01 | 2007-06-07 | Xixian Zhou | System and die for forming a continuous filament reinforced structural plastic profile by pultrusion/coextrusion |
US20070126142A1 (en) * | 2005-12-01 | 2007-06-07 | Xixian Zhou | Method of making continuous filament reinforced structural plastic profiles using pultrusion/coextrusion |
US7987885B2 (en) * | 2005-12-01 | 2011-08-02 | Saint-Gobain Performance Plastics Corporation | System and die for forming a continuous filament reinforced structural plastic profile by pultrusion/coextrusion |
US8852475B2 (en) | 2005-12-01 | 2014-10-07 | Saint-Gobain Performance Plastics Corporation | Method of making continuous filament reinforced structural plastic profiles using pultrusion/coextrusion |
US20100196613A1 (en) * | 2009-02-03 | 2010-08-05 | Nextrom Oy | Method and apparatus for coating a fiber bundle |
US20160363734A1 (en) * | 2015-06-10 | 2016-12-15 | Telect, Inc. | Fiber Blocking Kits |
US9835816B2 (en) * | 2015-06-10 | 2017-12-05 | Telect, Inc. | Fiber blocking kits |
US10401587B2 (en) | 2015-06-10 | 2019-09-03 | Telect, Inc. | Fiber blocking kits |
Also Published As
Publication number | Publication date |
---|---|
FR2475238B1 (fr) | 1984-08-10 |
DE3166755D1 (en) | 1984-11-29 |
EP0034286B1 (fr) | 1984-10-24 |
JPS56155904A (en) | 1981-12-02 |
EP0034286A1 (fr) | 1981-08-26 |
FR2475238A1 (fr) | 1981-08-07 |
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